Brown crispy leaves

Yes, it looks like a toxicity case. Flush with clean water several times, then give a smaller amount of nutes. Good luck bro👍

Quick fix would be foliar feeding. Spray cal mag on the plant. More serious is to identify your root and soil issues. What did you use? How are you checking the soil condition? What and how much you have been feeding her.

Hi mate, you may be having a few thing going on. Calcium and magnesium deficiency as well as low oxygen in root zone. You may be experiencing a lock out which is causing the Ca and Mg deficiency. usually caused by ph problems. A very small amount of hydrogen peroxide will add more oxygen to you soil when watering and just keep an eye on the temp of the water. Should be between 67/72'F. I Hope this helps, good luck and happy growing.